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Diffstat (limited to 'drivers/ide/tx4939ide.c')
| -rw-r--r-- | drivers/ide/tx4939ide.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/ide/tx4939ide.c b/drivers/ide/tx4939ide.c index bafb7d1a22e..30d0d256230 100644 --- a/drivers/ide/tx4939ide.c +++ b/drivers/ide/tx4939ide.c @@ -259,6 +259,12 @@ static int tx4939ide_build_dmatable(ide_drive_t *drive, struct request *rq) bcount = 0x10000 - (cur_addr & 0xffff); if (bcount > cur_len) bcount = cur_len; + /* + * This workaround for zero count seems required. + * (standard ide_build_dmatable do it too) + */ + if ((bcount & 0xffff) == 0x0000) + bcount = 0x8000; *table++ = bcount & 0xffff; *table++ = cur_addr; cur_addr += bcount; |